如果查询中使用星型连接指令，指令会将会话环境设置覆盖。
If star join directives are used in a query, directives override session environment setting.
STAR_JOIN—STAR_JOIN指令指示优化器尽可能地选择星型连接计划。
STAR_JOIN - the STAR_JOIN directive instructs the optimizer to favor a star join plan whenever possible.
在属性型指令中也可以这样做。
任意调整编织宽度，花型指令由电脑控制。
Pattern instructions controlled by chain to knit reliable and stable.
任意调整编织宽度，花型指令由电脑控制。
Pattern instructions controlled by chain to knit reliable and stable.
应用推荐